Quantum many-body scars and Hilbert space fragmentation: a review of exact results

S Moudgalya, BA Bernevig… - Reports on Progress in …, 2022 - iopscience.iop.org
The discovery of quantum many-body scars (QMBS) both in Rydberg atom simulators and in
the Affleck–Kennedy–Lieb–Tasaki spin-1 chain model, have shown that a weak violation of …

Quantum Hall physics: Hierarchies and conformal field theory techniques

TH Hansson, M Hermanns, SH Simon, SF Viefers - Reviews of Modern Physics, 2017 - APS
The fractional quantum Hall effect, being one of the most studied phenomena in condensed
matter physics during the past 30 years, has generated many ground-breaking new ideas …

Hilbert space fragmentation and commutant algebras

S Moudgalya, OI Motrunich - Physical Review X, 2022 - APS
We study the phenomenon of Hilbert space fragmentation in isolated Hamiltonian and
Floquet quantum systems using the language of commutant algebras, the algebra of all …

Thermalization and its absence within Krylov subspaces of a constrained Hamiltonian

S Moudgalya, A Prem, R Nandkishore… - Memorial Volume for …, 2022 - World Scientific
We study the quantum dynamics of a simple translation invariant, center-of-mass (CoM)
preserving model of interacting fermions in one dimension (1D), which arises in multiple …

Fractonic Luttinger liquids and supersolids in a constrained Bose-Hubbard model

P Zechmann, E Altman, M Knap, J Feldmeier - Physical Review B, 2023 - APS
Quantum many-body systems with fracton constraints are widely conjectured to exhibit
unconventional low-energy phases of matter. In this paper, we demonstrate the existence of …

A symmetry principle for topological quantum order

Z Nussinov, G Ortiz - Annals of Physics, 2009 - Elsevier
We present a unifying framework to study physical systems which exhibit topological
quantum order (TQO). The major guiding principle behind our approach is that of …

Topological Characterization of Fractional Quantum Hall Ground States from<? format?> Microscopic Hamiltonians

MP Zaletel, RSK Mong, F Pollmann - Physical review letters, 2013 - APS
We show how to numerically calculate several quantities that characterize topological order
starting from a microscopic fractional quantum Hall Hamiltonian. To find the set of …

Quantum many-body scars in a Landau level on a thin torus

S Moudgalya, BA Bernevig, N Regnault - Physical Review B, 2020 - APS
We study a kinetically constrained pair-hop** model that arises within a Landau level in
the quantum Hall effect. At filling ν= 1/3, the model exactly maps onto the so-called “PXP …

The half-filled Landau level: The case for Dirac composite fermions

SD Geraedts, MP Zaletel, RSK Mong, MA Metlitski… - Science, 2016 - science.org
In a two-dimensional electron gas under a strong magnetic field, correlations generate
emergent excitations distinct from electrons. It has been predicted that “composite fermions” …

Hydrodynamics in long-range interacting systems with center-of-mass conservation

A Morningstar, N O'Dea, J Richter - Physical Review B, 2023 - APS
In systems with a conserved density, the additional conservation of the center of mass
(dipole moment) has been shown to slow down the associated hydrodynamics. At the same …